Signs Your Commercial Flat Roof Needs Repairs or Replacement

Commercial flat roofs are incredibly popular for businesses thanks to their cost-effectiveness, durability, and ability to maximize usable space. However, like any other part of a property, flat roofs require regular maintenance to keep them in good condition. Ignoring commercial roofing issues can lead to costly repairs and even structural damage.

At RN Roofing, we’ve spent over 40 years helping businesses across the Twin Cities maintain their commercial flat roofs. Being a third-generation family-owned business, we understand how important it is to protect your investment.

Let us guide you through the signs that your commercial flat roof might need repair or replacement and what to do next.

Common Issues Affecting Commercial Flat Roofs

Even with proper installation and routine maintenance, commercial flat roofs can develop problems over time. While highly effective, TPO, EPDM, built-up roofing, and other roofing materials can become damaged or lose their effectiveness, especially as they age.

Here are some of the most common issues to watch for.

1. Ponding Water

Flat roofs aren’t entirely flat. They typically have a slight slope to allow water to drain.

However, drainage systems can fail, causing water to collect in dips or low spots. This is known as "ponding water."

Over time, standing water can weaken the roof structure, lead to leaks, and encourage mold and algae growth.

2. Blistering & Bubbling

If you notice bubbles or blisters on your roof's surface, they typically indicate that air or moisture has become trapped beneath the membranes. This can happen due to poor installation, extreme weather changes, or natural wear and tear.

Left unchecked, blisters can expand and compromise your roof's integrity.

3. Cracking or Splitting

Flat roofs are exposed to constant environmental stress, whether it’s freezing winters or scorching summers in the Twin Cities. Over time, the roof membrane can crack or split.

Cracks might seem minor initially, but they can allow moisture to seep through, causing significant damage.

4. Seam Damage

The seams can be weak spots for flat roofs with multiple layers or panels. Seam damage is one of the leading causes of leaks in commercial roofing systems.

Tear and wear at the seams can occur due to improper adhesion, temperature fluctuations, or old age.

5. Flashing Issues

Flashing, the material used to seal edges, joints, or penetrations (like HVAC units), often deteriorates over time.

Damaged flashing can allow water to seep into your building, leading to leaks and interior damage. Keep a close eye on this!

Performing a Basic Visual Inspection

Regular visual inspections can be your first line of defense.

While a professional inspection is always the best option, here’s how you can do a quick check yourself:

• Look for Obvious Signs of Damage: Walk along the perimeter of your building and examine the roof for visible issues like cracks, blisters, or ponding water. Also, check interior ceilings for discoloration or water stains, which may indicate roof leaks.

• Inspect Roof Gutters & Downspouts: Check for debris blockages or signs that water isn’t draining properly from your flat roof.

• Examine Flashing & Seams: Pay close attention to your roof's edges and seams, which are more prone to damage than continuous surfaces. Torn flashing or peeling seams usually mean trouble is brewing.

While visual inspections can help identify obvious problems, remember they aren’t a substitute for thorough, professional evaluations.

The Importance of Professional Inspections

Flat roof issues can sometimes go unnoticed for months — or even years — until they cause severe damage. Call professionals like RN Roofing for regular roof inspections to catch these issues early.

Here’s what a professional inspection typically involves:

• Detailed Assessment: Experts will evaluate every aspect of your roof, including the membrane, insulation, drains, flashing, and structural integrity.

• Moisture Detection: Technology like infrared scanning can detect trapped moisture beneath the surface.

• Comprehensive Report: Inspections usually include documentation, photos, and actionable recommendations for repair or maintenance.

With over four decades of experience, RN Roofing offers industry-leading inspection and preventative maintenance services that help Twin Cities businesses address issues before they escalate.

Repair or Replace Your Commercial Roofing?

Once you’ve identified an issue, the next question is whether to repair or replace your roof.

Here are some guidelines to help you decide:

When to Repair

• Damage Is Limited: If the underlying structure is still sound and the issues are confined to a small area, repairs can effectively solve the problem. Repairs are ideal for issues like isolated cracks, damaged flashing, or small patches of blistering.

• Roof Is Relatively New: If your flat roof is under 10 years old and has been regularly maintained, a good-quality repair should extend its life.

When to Replace

• Extensive Damage: If problems like ponding water, cracking, or seam damage impact large sections of the roof, replacement may be necessary.

• Roof’s Age Exceeds 20 Years: Most commercial flat roofs have a lifespan of about 20-25 years. If yours is nearing its end and frequently requires repairs, an upgrade will likely save you more in the long run.

• Repeated Repairs Aren’t Effective: If you constantly spend money on repairs, it might be time to consider a full replacement for better durability and cost efficiency.

At RN Roofing, we specialize in both thorough repairs and complete roofing replacement. Whether you need a quick fix or an entirely new system, our team offers the expertise you need to make informed decisions.

Protect Your Investment With Maintenance From RN Roofing

Maintaining a commercial flat roof doesn’t have to be overwhelming. Scheduling regular inspections and promptly addressing repairs can save you significant costs. Investing in professional services will ensure you get the most out of your roof.

If you’re in the Twin Cities area or anywhere in Minnesota and suspect your commercial flat roof needs attention, RN Roofing is here to help. With over 40 years of experience, we’ve built a reputation as trusted partners in commercial roofing solutions.

Contact us today by calling 952-929-0812 or contacting us online to schedule an inspection and protect your property the right way.